package com.zjrb.sjzsw.utils;

import android.app.Activity;
import android.content.Context;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.Rect;
import android.support.design.widget.TabLayout;
import android.util.DisplayMetrics;
import android.util.TypedValue;
import android.view.View;
import android.view.WindowManager;

import com.zjrb.sjzsw.App;

/**
 * 获得屏幕相关的辅助类(包括截图)
 */
public class ScreenUtil {
    private ScreenUtil() {
        /* cannot be instantiated */
        throw new UnsupportedOperationException("cannot be instantiated");
    }

    /**
     * 获得屏幕宽度
     *
     * @param context
     * @return
     */
    public static int getScreenWidth(Context context) {
        WindowManager wm = (WindowManager) context
                .getSystemService(Context.WINDOW_SERVICE);
        DisplayMetrics outMetrics = new DisplayMetrics();
        wm.getDefaultDisplay().getMetrics(outMetrics);
        return outMetrics.widthPixels;
    }

    /**
     * 获得屏幕高度
     *
     * @param context
     * @return
     */
    public static int getScreenHeight(Context context) {
        WindowManager wm = (WindowManager) context
                .getSystemService(Context.WINDOW_SERVICE);
        DisplayMetrics outMetrics = new DisplayMetrics();
        wm.getDefaultDisplay().getMetrics(outMetrics);
        return outMetrics.heightPixels;
    }

    /**
     * 获得状态栏的高度
     *
     * @param context
     * @return
     */
    public static int getStatusHeight(Context context) {
        int statusHeight = -1;
        try {
            Class<?> clazz = Class.forName("com.android.internal.R$dimen");
            Object object = clazz.newInstance();
            int height = Integer.parseInt(clazz.getField("status_bar_height")
                    .get(object).toString());
            statusHeight = context.getResources().getDimensionPixelSize(height);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return statusHeight;
    }

    /**
     * 获取当前屏幕截图，包含状态栏
     *
     * @param activity
     * @return
     */
    public static Bitmap snapShotWithStatusBar(Activity activity) {
        View view = activity.getWindow().getDecorView();
        view.setDrawingCacheEnabled(true);
        view.buildDrawingCache();
        Bitmap bmp = view.getDrawingCache();
        int width = getScreenWidth(activity);
        int height = getScreenHeight(activity);
        Bitmap bp = null;
        bp = Bitmap.createBitmap(bmp, 0, 0, width, height);
        view.destroyDrawingCache();
        return bp;

    }

    /**
     * 获取当前屏幕截图，不包含状态栏
     *
     * @param activity
     * @return
     */
    public static Bitmap snapShotWithoutStatusBar(Activity activity) {
        View view = activity.getWindow().getDecorView();
        view.setDrawingCacheEnabled(true);
        view.buildDrawingCache();
        Bitmap bmp = view.getDrawingCache();
        Rect frame = new Rect();
        activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);
        int statusBarHeight = frame.top;

        int width = getScreenWidth(activity);
        int height = getScreenHeight(activity);
        Bitmap bp = null;
        bp = Bitmap.createBitmap(bmp, 0, statusBarHeight, width, height
                - statusBarHeight);
        view.destroyDrawingCache();
        return bp;

    }

    public static int getPixels(Resources r, int dipValue) {
        int px = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dipValue, r
                .getDisplayMetrics());
        return px;
    }

    public static int dip2px(Context context, float dipValue) {
        if (context == null) {
            return (int) dipValue;
        }
        final float scale = context.getResources().getDisplayMetrics().density;
        return (int) (dipValue * scale + 0.5f);
    }

    public static int px2dip(Context context, float pxValue) {
        if (context == null) {
            return (int) pxValue;
        }
        final float scale = context.getResources().getDisplayMetrics().density;
        return (int) (pxValue / scale + 0.5f);
    }


    public static void dynamicSetTabLayoutMode(TabLayout tabLayout) {
        int tabWidth = calculateTabWidth(tabLayout);
        int screenWidth = getScreenWidth(App.getAppContext());

        if (tabWidth <= screenWidth) {
            tabLayout.setTabMode(TabLayout.MODE_FIXED);
        } else {
            tabLayout.setTabMode(TabLayout.MODE_SCROLLABLE);
        }
    }

    private static int calculateTabWidth(TabLayout tabLayout) {
        int tabWidth = 0;
        for (int i = 0; i < tabLayout.getChildCount(); i++) {
            final View view = tabLayout.getChildAt(i);
            view.measure(0, 0); // 通知父view测量，以便于能够保证获取到宽高
            tabWidth += view.getMeasuredWidth();
        }
        return tabWidth;
    }

}
